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Removed images and added text tables (#35900)

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Uma Sankar
2019-06-28 12:51:21 +05:30
committed by Randell Dawson
parent b18560f8d6
commit 1f6b3c082d
13 changed files with 884 additions and 366 deletions
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38
guide/english/sql/sql-create-index-statement/index.md
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@@ -23,16 +23,38 @@ ON table_name (column1, column2, ...);
Creating a new index on the student table's field, programOfStudy.
For reference, here is the current definition of the student table.
![image-1](https://github.com/SteveChevalier/guide-images/blob/master/create-index-statement01.JPG?raw=true)
Here's a statement to create the index, and a screen shot of the updated table definition:
```sql
create index pStudyIndex
on student (programOfStudy);
```text
+--------------------+----------------------+--------------+---------------+------------+
| column_name | column_default | is_nullable | column_type | key |
+--------------------+----------------------+--------------+---------------+------------+
| studentID | NULL | NO | int(11) | PRI |
| FullName | NULL | YES | varchar(90) | |
| sat_score | NULL | YEs | int(4) | |
| recordUpdated | CURRENT TIMESTAMP | NO | timestamp | |
| recordCreated | 0000-00-00 00:00:00 | NO | timestamp | |
| programOfStudy | NULL | YES | varchar(200) | |
+--------------------+----------------------+--------------+---------------+------------+
```
![image-1](https://github.com/SteveChevalier/guide-images/blob/master/create-index-statement02.JPG?raw=true)
* Here's a statement to create the index, and below is the updated table definition:
```sql
create index pStudyIndex
on student (programOfStudy);
```
```text
+--------------------+----------------------+--------------+---------------+------------+
| column_name | column_default | is_nullable | column_type | key |
+--------------------+----------------------+--------------+---------------+------------+
| studentID | NULL | NO | int(11) | PRI |
| FullName | NULL | YES | varchar(90) | |
| sat_score | NULL | YEs | int(4) | |
| recordUpdated | CURRENT TIMESTAMP | NO | timestamp | |
| recordCreated | 0000-00-00 00:00:00 | NO | timestamp | |
| programOfStudy | NULL | YES | varchar(200) | MUL |
+--------------------+----------------------+--------------+---------------+------------+
```
In MySQL, you use the ALTER TABLE command to change and drop indexes. The MySQL Workbench also provides GUI tools to manage indexes.